Jttsto bjrvas ostolaza



Jusro 1in-ves osToLAza, or Los ensures, CALIFORNIA.

NON-SMD DEVXCE AND EME-RGENCY-BRAKE.

Larnaca.

Specification of Letters Patent. V

Application led August 21, 1917. Serial No. 187,488.

To allwhom it may concern."

Be it known that J UsTo RivAs Os'roLAzA, a subjectl of the King ofSpain, and resident of Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Improvement in Non-Skid Uevices and Emergency-Brakes, of which the following is a specification.

This invention relates to an improved emergency brake and non-skid device, and has for its object the provision of improved .means for'placing the device in operative and, also to provide a brake means that may be used'and operated independently with reference to the ordinary service brakes.

Another object of the invention is to provide means for quick application of the brake toa velificleanndto provide a brake means that .be lowered and brought between the ground and the tread of the wheels, and thus prevent the skidding of the vehicle, with the resultant wear on the tires, while at the same time the vehicle brought to a stop. i

' nother object is to produce a brake means that is more eiiicient in use, and positive and automatic in action than einergency brakes of prior construction.

`Further 'objects and advantages may appear from the following detail description. -n the drawings: Figure 1 is a side elevation 'of an emergency brake, embodying my position,

' invention, the'brake and non-skid device being in operatiye position;v Fig. 2 is a sectional detail view of the saine; Fig. '3 is a top plan of the brake shoe ;v Fig. 4 is a rear elevation of the brake and non-skid device; together with a fragment ofthe motor vehicle foot-board to which it is attached; and

, Fig. 5 is a sectional detail of the valve and operatvemeans for control of pressure to operate the brake.

Referring to the drawings: The essential features of this invention consist of abrake cylinder 6, rigidly attached to foot-board 7 of amotor vehicle, a crosshead guide 8, attached to the foot-board, a brake shoe 9, and suitable connecting means to actuate the brake' shoe `to operative and toinoperative position. ,Y

' The piston 10, working within the cylinder, may be actuated by either compressed air or steam, admitted through ports 1 1, 12, in opposite ends of the cylinder. A

rod-13 extends from piston 10 to,crosshead the piston 14, working in the crossliead guides. A connecting rod l5, has pivotal connection with the crosshead and shoe 9. The brake shoe is provided with non-skid ribs 16, divergent toward the rear to secure greater retardation when in Contact with the ground.

The tongue 17. extends downward from the foot-board, and determines the position of the brake-shoe in the inoperative position, also serving to deflect the shoe downward as it moves to the operative position, and has a contour conforming with 'the tire groove4 18 'in the brake-shoe, thereby preventing accumulation of foreign material thereon whileJ in inoperative position. I

Patented Judy i5, MMS). l

Means to retain the brake shoe in inoperax tive position consist of cords 19, secured to lugs 20, on the shoe, and passing over pulleys 21; the cords having their opposite ends. secured to spring coils 22, in turn secured' to lugs 23,'` project-ing from the foot-board. The spring coils and cords coperate toretain the brake shoes in close proximity to thelfoot-boards in -inoperative position. .A spring 24, secured to the brake shove, and

'bearing against rod 15, serves to maintain alinement thereof 1n inoperative position of the brake shoe.

in use, air or' steam pressure may be admitted to either side of the piston to operate the brake and non-skid shoe. .ln Fig. 5 is shown a pressure or control valve, consisting of cylinder 25, having therein two pistons 26, 27, spaced apart to form a chamber 28, which is in constant communication. with pressure inlet port 29. The pistons are mounted on rod 30, and are maintained in neutral position by opposed spring coils 31, 32, bearing against a hul-fer 33, fixed to rod 30. Service ports 34, 35, are respectively,

in communication with ports 11, 12. To admit pressurev to port l1, the pistons are shifted so that piston 26 will open port 34:; the port remaining open so long as pedal 36 is depressed. lThis will cause the non-skid shoe to be thrown into operative By depressing edal 37,'the opposite presosition.

sure port 35 is p aoed in communication with pressure chamber. The arrangement is such lthat as onepressure por-t is opened, the other will remain closed. 0n opening pressure port 34, the corresponding release port 3,8;is closed, and on opening pressure port .'85, the corresponding release port L39 is closed'. Pedals 36,37', are fulcrumed on an intermediate pivot 40, and the rock-arm 4.1,

iio

integral with both pedals, is connected by a link 42, to buffer To operate the brake, the pedal 36 is depressed by the operator, thereby admitting pressure to the cylinder 6 which serves to shift the brake shoe to operative position beneath lthe automobile wheel. To release the brake shoe, the opposite pedal is depressed, thereby admitting pressure to the 1) opposite end of the cylinder, which serves to retract the brake shoe to inoperative position.

From the foregoing it may be seen that l have constructed a simple and efiicient nonskid apparatus for motor vehicles, that may be readily brought into operation with the depression oil a Vfoot lever. As various sources oi pressure for the operation of this device may be employed, I have not illus- 2G trated the Same. The application ofthis device is practically instantaneous, and the two-fold function performed thereby', Will diminish and prevent accidents,- and avoid Wear detrimental to the tires.

What is claimed is:

1. rlhe combination with a rear Wheel and foot-board 'or an automobile, of a cylinder beneath the foot-board, a piston working Within tire' cylinder, a crosshead guide, a.

3o crosshead Working on the guide, a connecting` rod between the crosshcad and piston,

a bar pivotally connected to the crosshead, a

brake shoe pivot-ally connected to the bar,

and arranged in proximity to the rear Wheel, said. brake shoe being provided with a curved and inclined tire groove, a tongue denending from the 'toot-board and engagwith said groove todelect the shoe upon initial niovement to operative posi- 40 tion, andfmeans for admitting fluid ressure to the cylinder to actuate the piston therein.

The conibination with the foot board of an automobile, of a cylinder beneath the foot board, .a piston Working therein, a crosshead guide beneath the foot board, a cross head working thereon, a piston rod :connecting the piston and crosshcad, a bar Vleaf spring fixed to the shoe and serving to maintain the shoe in alinementwith the operating bar, and spring and cord elements to retain the shoe in inoperative position.

3. In a non-skid device, the combination with the rear Wheels and foot-board of a motor vehicle, of a cylinder beneath the foot-board, a reciprocating piston therein, a piston rod extendingtherefrom, a crosshead actuated by the piston and piston rod, a brake-shoe, a connecting rod between the crosshead and brake shoe, and means to admit a fluid medium pressure to the cylinder and thereby actuate the brake shoe to nonskid osition.

'/l. `n a non-skiddevice, the combination With the rear Wheels and foot-board of a' motor vehicle, of a cylinder beneath the footboa1'd, a crosshead guide, a crosshead working' on the guide, a piston u forking- Within the cylinder, a piston rod connecting the piston and Crosshead, a bar pivoted to the crosshead, a brake shoe pivoted to the bar and adapted to Contact with the ground, and means .for admitting a fluid medium pressure to the cylinder.

In testimony whereof, I hereunto aflix my signature, this 16th day of August, 1917.

JUST() RIVAS USTOLAZA. Witnesses:

J. A. BERNAL, FREDERIC M. Keener. 

